diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 2b0b1da763..f532f3ffff 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -102,6 +102,11 @@ typedef struct BTMetaPageData uint32 btm_level; /* tree level of the root page */ BlockNumber btm_fastroot; /* current "fast" root location */ uint32 btm_fastlevel; /* tree level of the "fast" root page */ + /* following fields are available since page version 3 */ + TransactionId btm_oldest_btpo_xact; /* oldest btpo_xact among of + * deleted pages */ + float4 btm_last_cleanup_num_heap_tuples; /* number of heap tuples + * during last cleanup */ } BTMetaPageData; #define BTPageGetMeta(p) \ @@ -109,7 +114,8 @@ typedef struct BTMetaPageData #define BTREE_METAPAGE 0 /* first page is meta */ #define BTREE_MAGIC 0x053162 /* magic number of btree pages */ -#define BTREE_VERSION 2 /* current version number */ +#define BTREE_VERSION 3 /* current version number */ +#define BTREE_MIN_VERSION 2 /* minimal supported version number */ /* * Maximum size of a btree index entry, including its tuple header. @@ -481,6 +487,9 @@ extern void _bt_finish_split(Relation rel, Buffer bbuf, BTStack stack); * prototypes for functions in nbtpage.c */ extern void _bt_initmetapage(Page page, BlockNumber rootbknum, uint32 level); +extern void _bt_update_meta_cleanup_info(Relation rel, + TransactionId oldestBtpoXact, float8 numHeapTuples); +extern void _bt_upgrademetapage(Page page); extern Buffer _bt_getroot(Relation rel, int access); extern Buffer _bt_gettrueroot(Relation rel); extern int _bt_getrootheight(Relation rel); |